rust: Visibility exports for bindgen am: e14ade328c

Original change: https://android-review.googlesource.com/c/platform/external/open-dice/+/2169517

Change-Id: Ib936fbead92afcf2495c792417718892f0f861b1
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>